@Santhosh Sankaran I'm running into the same thing. Nothing out there on this. We'd like to understand who out there in the company are using AppIDs and to which SharePoint Site Collections they are associated.
Using Graph API (you can test using https://developer.microsoft.com/en-us/graph/graph-explorer ) you can pull info about a particular AppID, even if it was created from the SharePoint side using /AppRegNew.aspx
Problem is there is no owner info in the properties returned when hitting above endpoint.
Microsoft is allowing you to query for them, and you can even see some details in Azure Portal (when searching using Enterprise Applications under Azure Active Directory) but there is a disconnect with the associated SharePoint site collection.
